234431021 has 8 divisors (see below), whose sum is σ = 263993088. Its totient is φ = 206244000.

The previous prime is 234431009. The next prime is 234431023. The reversal of 234431021 is 120134432.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 234431021 - 2⁶ = 234430957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 234430984 and 234431002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234431023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343400 + ... + 344081.

It is an arithmetic number, because the mean of its divisors is an integer number (32999136).

Almost surely, 2^234431021 is an apocalyptic number.

It is an amenable number.

234431021 is a deficient number, since it is larger than the sum of its proper divisors (29562067).

234431021 is a wasteful number, since it uses less digits than its factorization.

234431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687523.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 234431021 is about 15311.1404212750. The cubic root of 234431021 is about 616.6021381063.

Adding to 234431021 its reverse (120134432), we get a palindrome (354565453).

The spelling of 234431021 in words is "two hundred thirty-four million, four hundred thirty-one thousand, twenty-one".